Non-reactive rf treatment of multiwall carbon nanotube with inert argon plasma for enhanced field emission

被引：71

作者：

Ahn, KS ^{[1
]}

Kim, JS ^{[1
]}

Kim, CO ^{[1
]}

Hong, JP ^{[1
]}

机构：

[1] Hanyang Univ, Dept Phys, Seoul 133791, South Korea

来源：

CARBON | 2003年 / 41卷 / 13期

关键词：

carbon nanotubes; surface treatment; infrared spectroscopy; field emission;

D O I：

10.1016/S0008-6223(03)00294-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

External rf plasma irradiation of well-aligned multiwall carbon nanotubes (MWCTs) was demonstrated as a simple purification process. The plasma exposure to argon (Ar) gas was performed in situ in order to modify any structural defects and to vaporize contamination of the MWCTs grown at the extremely low temperature of 400 degreesC. Scanning electron microscopy and transmission electron microscopy confirmed the catalytic particle removal from the MWCT edges. In addition, Fourier transformer infrared spectroscopy and energy dispersive spectrometry showed that Ar plasma atoms were not chemically terminated by carbon atoms because of the inertness of the Ar atoms. The structural enhancement in the MWCTs resulted in a reduction of the turn-on field from 1.65 V/mum to 0.93 V/mum and an increase in the field emission current. (C) 2003 Elsevier Ltd. All rights reserved.

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页码：2481 / 2485

页数：5

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